MAGNETOCRYSTALLINE ANISOTROPY AND SPIN REORIENTATION IN NDFE(12-X)MO(X) AND NDFE12-XMOXNY COMPOUNDS (X=0.5, 1,0, 2.0, 3.0, 4.0 AND Y-APPROXIMATE-TO-1.0)

Spin reorientation transitions have been detected in NdFe12-xMox by me asuring the temperature dependence of the a.c. susceptibility in the t emperature range from 4.2 to 300 K. No spin reorientation was traced i n NdFe12xMoxNy. Uniaxial anisotropy was detected in NdFe12-xMoxNy. The temperature dependence of the uniaxial anisotropy field of NdFe12-xMo xNy and NdFe12-xMox has been measured in the temperature range from 17 0 to about 550 K by using the singular point detection (SPD) technique in a pulsed-field magnetometer. NdFe11MoN1.3 and NdFe10Mo2N0.9 can be considered as possible materials for permanent magnet fabrication, ho wever, with less chance to compete with Nd2Fe14B and/or Sm2Fe17Nx.